Correct answer
1.6 mm
It is 1.6 mm under Annex VII.2 of the General Vehicle Regulations. This is the minimum for M1, N1, O1 and O2, not a universal value for every vehicle. Main grooves are those forming the main tread pattern; also check tyre condition, damage and pressure. Meeting the minimum does not guarantee adequate grip in every situation, and earlier replacement may be appropriate according to condition and manufacturer guidance. This case excludes the limited exception for certain historic vehicles.
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1 mm
2.5 mm
1.6 mm
The real exam in English is a translation of the Spanish original; compare both here.
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Excluyendo la excepción reglamentaria de ciertos vehículos históricos, ¿cuál es la profundidad mínima legal en las ranuras principales de los neumáticos de un turismo M1?
- 2,5 mm
- 1,6 mm(Correct answer)
- 1 mm
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